基于卡尔曼滤波的无线传感器网络时钟同步协议

J4 ›› 2010, Vol. 45 ›› Issue (11): 32-36.

基于卡尔曼滤波的无线传感器网络时钟同步协议

郭文娟1,2,王英龙1,2,魏诺1,3,郭强1,3,周书旺1,2,3

1.山东省计算中心, 山东济南 250000; 2.山东师范大学信息科学与工程学院, 山东济南 250014;
3.山东省计算机网络重点实验室, 山东济南 250014

收稿日期:2010-06-30 出版日期:2010-11-16 发布日期:2010-11-24
作者简介:郭文娟(1983-),女,硕士研究生,主要研究领域为无线传感器网络. Email: guowj@keylab.net
基金资助:
国家自然科学基金资助项目(60802030);山东省中青年科学家科研奖励基金资助项目(2007BSC01002);山东省科技攻关计划项目(2007GG2QT01007)

A time synchronization protocol for wireless sensor networks based on the Kalman filter

GUO Wen-juan1,2, WANG Ying-long1,2, Wei Nuo1,3, GUO Qiang1,3, ZHOU Shu-wang1,2,3

1. Shandong Computer Science Center, Jinan 250000, Shangdong, China;
2. School of Information Science and Engineering, Shandong Normal University, Jinan 250014, Shangdong, China;
3. Shandong Provincial Key Laboratory of Computer Network, Jinan 250014, Shandong, China

Received:2010-06-30 Online:2010-11-16 Published:2010-11-24

摘要/Abstract

摘要：

在本文提出的时钟同步协议中,节点依据所持能耗大小在有限通信区域内完成时钟同步,即高耗节点通过监听低耗节点间进行同步交互的TPSN同步信标实现Receiver-Only同步模式,并通过引用卡尔曼滤波方法优化同步节点的时钟偏差以降低同步误差率。实验仿真表明,该同步协议与TPSN同步法相比提高了同步精度。

关键词: 无线传感器网络;时间同步;TPSN算法;卡尔曼滤波

Abstract:

On the basis of the amount of power held, the sensor nodes can realize time synchronization in limited communication domains.Namely,according to monitoring TPSN synchronization beacons that is for synchronization exchanges between low-energy nodes, the high-energy nodes can achieve the Receiver-Only time synchronization mode. And through citing the Kalman filter method in this mode to optimize the synchronous node′s clock deviation, the synchronization error rate can be effectively decreased. Experimental simulation shows that this synchronization protocol, compared with the TPSN synchronization algorithms, greatly improves the synchronization accuracy.

Key words: wireless sensor networks; time synchronization; TPSN algorithm; Kalman filter

郭文娟1,2,王英龙1,2,魏诺1,3,郭强1,3,周书旺1,2,3. 基于卡尔曼滤波的无线传感器网络时钟同步协议[J]. J4, 2010, 45(11): 32-36.

GUO Wen-juan1,2, WANG Ying-long1,2, Wei Nuo1,3, GUO Qiang1,3, ZHOU Shu-wang1,2,3. A time synchronization protocol for wireless sensor networks based on the Kalman filter[J]. J4, 2010, 45(11): 32-36.

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